Burner unit for gas heating apparatus



Aug. 2, 1932. H. w. ODOWD 1,369,942

BURNER UNIT FOR GAS HEATING APPARATUS Filed Nov. 10, 1926 2 Sheets-Sheet 1 INVENTOR Aug. 2, 1932. H. w. ODOWD 1,869,942

BURNER UNIT FOR GAS HEATING APPARATUS Filed Nov. 10, 1926 2 Sheets-Sheet 2 INVENTOR Patented Aug, 2, 1932 HENRY W. QDOWD, 0F JERSEY CITY, NEW JERSEY, ASSIGNQR Ti) BTMDAED GM EQ- MEN '1 CQEPOBATION, A. CORPOM'EIQN 6L HAEYLAJND UNIT FGE GAE; TING i one scribed a burner equipment for gas ranges end the like, wherein n Bunsen burner memberformed with dance ports is combined with e coverplete sustained by said member in spaced relation thereto and provided with secondary air discharge openings through.

which the fiezne jets project when the homer is in operation,

The present invention is directed to on F improvem nt upon ssid burner equipment end has for en object to provide it burner unit which not oniy realize the advantages of seid prior eonigoinent but also possess adventeges peculiar to itself.

The invention consists hroadiy in loceting the oi the hurner member so that they they be segregated into groups of individuei posts errenged in close contiguity, end in forming the secondary sit discharge openings of the cover-plate so thet the fieine jets from all the ports of e, group will be projected throu h one or e common discharge opening, and this without impairing the integrity of the individual flame jets, and in the some manner and with the some genetei results as it said flame jets were projected eech through its own individuei disehsrge opening in the coverplete.

The burner unit eccordingto this inven-' tion hes the important edvsntae, among others, that the ionic ports may e greatly increased in numb-er for at given size of burner member end the heating eficiency of the burner unit correspondingly increased. Like the burner unit, also, upon which it is an improvement, it hes been found to be remei'kebiy efiicient and free from many of the objections of prior constructions, the coverplete not only providing for the proper aeration of the burnerflames, but serving in addition to prevent contamination of the secondary air supply by the waste products as well as to guard against back pressure, flame deflection, air currents and other infiuences which interfere with proper comhustion or impair the heating efieiency of the burner.

In order that the invention army he fully understood there will now he described by we of example and with reference to the sccompenying drawings, a construction of the spperetus made in eccordence with the invention.

In these drswings:

Fig i is e verticei section of e gels renge equipped with burner units mode in accord: once with the invention;

Fig. 2 is a plan view of the range shown in Fig. 1, posts heing broken or omitted to expose the improved burner units;

Fig. 3 is plan view of the impeoved hurries unit per so, with e, portion of the covenplete removed;

Fig. 4% is e seotionei elevation token-on the time H on? Fig, 3, loci-ring in the direction oi? the eerows;

Fig. 5 is e imginentery sections]; eievetion taken on the iine 5-5 of Fin. 3, looking in the direction of the arrows.

Referring to the drawings, the Bunsen burner member A therein shown is of the well imown ster type and hes in eech of its i rench arms a row of nihs A eiined in ciose contignity end having orifices through which the gaseous mixtures issues and which con stitute the heme ports of the burner, En tending forwerdiy troni the heroes member is e mining tube if provided, as nsuei with en eir chemher A into which the gee is discharged from at nozzle A under the conttoi of e stop cool; or valve A. As host shown in Fig. 3, the centred weh portion of the burner member is'torined with openings to allow secondery air to how upwerdiy therethtough.

In accordance with the present invention. the Bunsen burner member A. is pertieliv enclosed within e eoverplete B, which, in this instance, is formed with a depending flange or hood B extending around the outer ends of the branch erms of the burner member. In its lower edge, the flange or hood B is formed with recesses or notches B engaged with supporting lugs A cost or otherwise secured to the ends of four of the branch arms of the burner et symmetrically located aespoints. The coverplate is held in place upon the supporting lugs by means of a cotter pin A passed through a perforated ear piece A extended upwardl from the burner member through a centrally located slot 13 in the ooverplate. As will be noted, the arrangement of the parts is such that the coverplate B is maintained in spaced relation to the burner member-A so as to provide in connec tion therewith a secondary air chamber C having as its inlet the openin s C created between the branch arms as we l as the more centrally located openings A of the burner member. As an outlet for the secondary air chamber C, the coverplate B is formed with a plurality of discharge openings B, one for each of the groups of flame ports presented by the res ective arms of the burner member. Pre erably and as herein shown, the sides of the dischar e openings B are given a wavy or serrate configuration so as to form a group of alined and closely contiguous open-sided discharge nozzles B arranged directly above the gas nibs A and disposed in centered relation to the flame ports. In the particular construction shown, the upper ends of the as nibs are situated below the under face 0 the coverplate but they might be made longer or shorter, if desired. The main consderation is that, when the burner is in use, the flame jets shall project through the secondary air discharge openings so as to entrain from the chamber C whatever quantity of secondary air is required to support combustion. And in this respect it is pointed out that the serrated sides of the discharge, openings, while not meeting to form closures, do direct secondary air to the flames projecting through the discharge nozzles and maintain the integrity of the individual flames, as in keeping them from mushing with each other, and surround each flame with a column or aura of secondary air.

Many advantages characterize the fore 0- ing construction. It will be apparent, or example, that the number of flame ports in the burner member for any given space may be increased to any desired extent consistent with proper flame propagation, due to the fact t at a single or common secondary air discharfge opening serves all of the flame ports 0 each grou This feature is articuarly useful in re ucin the size of t flame orts so as corres on ingly to reduce the ack pressure at-t e ports and to prevent popping back, such reduction in the size 0 t e flame ports being com nsated for of course by the increase allowe in the number of ports. Moreover, it is to be noted that these advantages do not destroy certain other advantages attending the combination of burner unit and coverplate. For instance, the secondary air is supplied to the burner in substantially pure atmospheric condition and without contamination by the waste products, being drawn into the interior chamber C through the openings 0 and A which are located below the level of the flame ports, and then entrained from the chamber directly by the flame jets as they project through the discharge nozzles B. As matter of fact, the coverplate serves to prevent the secondary air from commingling with the flame 'ets except through the discharge nozzles. gain, the burner, being Protected against the heat of the products 0 combustion, has less tendency to cause an excessive ex ansion of the contained gas such as would re ace the entrainment of the rimary air. On the other hand, the air poc eted within the coverplate becomes heated by the products of combustion and may therefore be more effectively entrained at the flame ports.

In this connection, it may be stated that the discharge openings not only facilitate the proper entrainment of secondary air but also serve to effect a thorough admixture of the gas and air in promoting combustion. Also, the pressure of the products of combustion at the flame ports is reduced to a minimum, thereb lessening the tendency to back pressure an hence more nearly preserving the initial entrainment of primar air. -Moreover, the coverplate protects the urner member from contrary air currents or flame deflection or other moving bodies which might otherwise interfere with proper combustion. These and other advantages will be readily appreciated by those skilled in the art.

In the preferred construction above described, the dischar e openings are shown with serrated sides, ut the invention in its broader aspects contemplates other forms of discharge openings. For instance, each discharge opening may be in the form of an even or straight edgedslot of a width suflicient to permit the assage therethrough of the flame jets and their auras of secondary air but not so wide as to permit an excess of seconds. air to cause the flame jets to mush or lose irection or otherwise to impair the integrity of the flame jets. In such case, the side walls of the slot should preferably converge upwardly so as to produce a better entrainment of the secondary air. Also, it is pointed out that the discharge openings need not be rectilinear, but may follow curved or angular courses corresponding with the alinement of the flame ports of any group.

In Figs. 1 and 2 the burner unit is illustrated as embodied in a gas range presenting a cooking top 27 with open grids 28 above the burner units and an underlying combustion chamber 33. The improved burner units (four in the present instance) are located within the combustion chamber in the front and rear portions thereof, being su ported upon transverse rods or bars 34 which mainin them the proper distance from the cookiii ing top, and the stop cocks or valves A of the respective units being connected to a common gas supply pipe or manifold 66 situated at the front of the range.

The open grids provide the outlets for the products of combustion, and at the front the combustion chamber is provided with a secplate 13, it being noted that the depending;

flange or hood B of the coverplate. acts to directsaid air upwardly into the chamber C formed between the burner member and the coverplate. In this way. the secondary air required to support combustionis induced into and entrained from the chamber C under the positive control of the flame jets, thus insuring the proper speed of combustion or flame propagation and allowing-the burners to be located as near the cooking top as may be desired without giving rise to the objections so common in the use of the ordinary gas burners.

The invention is not, of course, confined to the precise constructions shown and described, nor to any other particular construction by which the same may be carried into effect, as many changes may be made in the details without departing from the main principles of the invention and without sacrificing its chief advantages.

, Having thus described my invention, what I claim is:

1. A burner unit including, in combination, a Bunsen burner member having a group of aligned individual flame ports arranged in close proximity to each other, and a unitary cover plate sustained above said burner member and having a. continuous discharge opening common to all the flame ports and presenting side walls disposed at opposite-sides 'of said ports, said cover plate forming between itself and the burner member a secondany air chamber and having its discharge opening situated in a zone immediately above that of the flame ports, whereby the flame jets entrain secondary air 7 and are discharged therewith through said discharge opening.

2. A burner unit including, in combination, a Bunsen burner member having individual flame ports arranged in groups, the ports in each group being aligned with and arranged in close proximity to each other, and a unitary cover plate sustained above said burner member and having a plurality of separate continuous discharge openings, one for each group of flame ports and common to all of the flame ports of that group, each discharge opening presenting side walls disposed at opposite sidtes of said ports, said cover plate forming between itself and the burner-mem-. her a secondary'air chamber and having its discharge openings located in a zone immediately above that of the flame ports, whereby the flame jets entrain secondary air and are discharged therewith through said discharge openings;

3. A burner unit including, in combination, a Bunsen burner member having a group of aligned individual flame ports arranged in close proximity to each other, and a cover plate sustained above said burner member and having a continuous discharge opening common to all the flame ports, said cover plate forming between itself and the burner memher a secondary air chamber and having its discharge opening situated in a zone immedi-' ately adjacent that of the flame ports, and the said discharge opening presenting serrated parallel sides with the serrations on opposite sides in register and forming between them discharge nozzles for the individual flame jets, whereby the flame jets entrain secondary air and are discharged therewith through said discharge nozzles.

4. A burner unit including, in combination, a Bunsen burner member having'individual flame ports arranged in groups, the ports in each group being aligned with and arranged in close proximity to each other, and a cover plate sustained above said burner member and having a plurality of separate continuous discharge openings, one for each group of flame ports and common to all of the flame ports of that group, said cover plate forming between itself and the burner member a secondary air chamber and having its discharge openings located in a zone immediately adjacent that of the flame ports, and the said discharge openings each presenting serrated parallel sides with the serrations on opposite sides in register and forming'between them discharge nozzles for the individual flame jets, whereby the flame jets entrain secondary air and are discharged therewith through said discharge nozzles'.

5. In or for a gas range equipped with a cooking top, a burner unit situated below the cooking top and including, in combination. a Bunsen burner member having a group of aligned individual flame ports arranged in close proximiity to each other, and a unitary cover plate interposed between the burner member and the cooking top and forming a secondary air space between the burner member and the cover plate and a combustion space between the cover plate and the cooking top, said cover plate being formed with a discharge opening disposed directly above and common to all of the flame ports and presenting side walls disposed at opposite sides of said ports, whereby the flame jets entrain secondary air and are discharged therewith through said discharge opening.

6. In or for a gas range equip ed with a. cooking top, a burner unit situate below the cooking top and including, in combination, a Bunsen burner member having a group of aligned individual flame ports arranged in close proximity to each other, and a cover plate interposed between the burner member and the cookin top and forming a secondary air spacehetween the burner member and the cover plate and a combustion space between the cover plate and the cooking top,

said cover plate being formed with a discharge opening (lisposed directly above and common to all of the flame ports, and said opening presenting serrated parai el sides with the serrations on opposite sides in register and formin between them discharge nozzles for the individual flame jets whereby the flame jets entrain secondary air and are discharged therewith through said discharge opening.

In testimony whereof, I have aflixed my signature hereto.

HENRY W. ODOWD. 

